jsp九個內建物件及4個作用域request請求物件　型別javax.servlet.ServletRequest作用域Requestresponse響應物件型別javax.servlet.SrvletResponse作用域PagepageContext頁面上下文物件型別javax.servlet.jsp.PageContext作用域Pagesession會話物件型別javax.servlet.http.HttpSession作用域Sessionapplication應用程式物件型別javax.servlet.ServletContext作用域Applicationout輸出物件型別javax.servlet.jsp.JspWriter作用域Pageconfig配置物件型別javax.servlet.ServletConfig作用域Pagepage頁面物件型別javax.lang.Object作用域Pageexception例外物件型別javax.lang.Throwable作用域page